Preparation, structural characterization, and evaluation of ion-exchange behavior of a new polyoxometalate, [Me2NH2](3)[Mo12O40S] in separation of carrier-free Y-90 from Sr-90

摘要

A new ion-exchanger having chemical formula [Me2NH2](3)[Mo12O40S] and belonging to the class of Keggin type polyoxometalate was synthesized and characterized by single-crystal X-ray structure determination. The crystal of the exchanger is rhombohedral, space group R-3 with cell dimensions, a =16.504(18) angstrom, b =16.504(18)angstrom (1) angstrom, c =25.23(3)angstrom and alpha=90.00 degrees, beta=90.00 degrees, gamma=120.00 degrees and Z =6, 3.284 g cm(-3). The compound behaves as an ion-exchanger and it is significantly stable towards thermal, chemical environments and total radiation dose of 35.0 kGy. Radiochemical separation of the short-lived daughter carrier-free (9)degrees Y (T-1/2 =64.08 h) from its long-lived parent Sr-90 (T-1/2 =29 a) using this material at pH 6.0 with 1.0% EDTA solution as an eluent.